diff --git a/CMakeLists.txt b/CMakeLists.txt
index f218a82a..9da77e67 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -63,7 +63,7 @@ if(USEGPU)
 endif()
 
 #==== Compiler Options
-set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 if(USEGPU)
diff --git a/src/nyx/output_2_csv.cpp b/src/nyx/output_2_csv.cpp
index ebbbe196..395f5aea 100644
--- a/src/nyx/output_2_csv.cpp
+++ b/src/nyx/output_2_csv.cpp
@@ -828,7 +828,7 @@ namespace Nyxus
 
 		// other columns
 		std::vector<std::string> textcols;
-		textcols.push_back ((fs::path(ifpath)).filename().u8string());
+		textcols.push_back ((fs::path(ifpath)).filename().string());
 		textcols.push_back ("");
 		int roilabl = r.label; // whole-slide roi #
 
@@ -862,8 +862,8 @@ namespace Nyxus
 			// Tear off pure file names from segment and intensity file paths
 			fs::path pseg(r.segFname), pint(r.intFname);
 			std::vector<std::string> filenames;
-			filenames.push_back(pint.filename().u8string());
-			filenames.push_back(pseg.filename().u8string());
+			filenames.push_back(pint.filename().string());
+			filenames.push_back(pseg.filename().string());
 
 			for (auto& enabdF : F)
 			{